MESON Chess Problem Database

Problem Display
PID: 269869 (K3QBB1/8/ppN1n2r/1b2P3/p1kp1N2/2q1n3/P7/2R3b1 w - - 0 1)

Svitek, Miroslav

Tehtavaniekka, 2021

K3QBB1/8/ppN1n2r/1b2P3/p1kp1N2/2q1n3/P7/2R3b1

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Bxc6+
      • 2.Qxc6#
  • Tries
    • 1.Bxe6+?
      • 1...Sd5
        • 2.Bxd5#
      • 1...Rxe6!
    • 1.Qxe6+?
      • 1...Sd5
        • 2.Qxd5#
      • 1...Rxe6!
    • 1.Qc8?
      • threat
        • 2.Sa5#
      • 1...Bxc6+
        • 2.Qxc6#
      • 1...a5
        • 2.Sxa5#
      • 1...d3!
    • 1.Qd8?
      • threat
        • 2.Qxd4#
      • 1...Sd1
        • 2.Qd5#
      • 1...Sf1
        • 2.Qd5#
      • 1...Sc2
        • 2.Qd5#
      • 1...Sg2
        • 2.Qd5#
      • 1...Sg4
        • 2.Qd5#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sf5
        • 2.Qd5#
      • 1...d3
        • 2.Qxd3#
        • 2.Qd4#
      • 1...Bxc6+!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qxd4#
      • 1...Bxc6+
        • 2.Qxc6#
      • 1...Sd1
        • 2.Qd5#
      • 1...Sf1
        • 2.Qd5#
      • 1...Sc2
        • 2.Qd5#
      • 1...Sg2
        • 2.Qd5#
      • 1...Sg4
        • 2.Qd5#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sf5
        • 2.Qd5#
      • 1...d3
        • 2.Qxd3#
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • B(g);CHECK,OGATE,XS(E)::QAR2(G),XB(g)
  • Tries
    • Try
      • B(I);CHECK,XS(j)
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::B(I),XS(c)
      • Refutation
        • R(k);XB(I)
    • Try
      • Q(G);CHECK,XS(j)
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAB1(G),XS(c)
      • Refutation
        • R(k);P_SPINR(k),XQ(G)
    • Try
      • Q(G);
      • Threat
        • QAR(G)+S(E),DCHECK
      • Vars
        • B(g);CHECK,OGATE,P_SPINB(g),XS(E)::QAR2(G),XB(g)
        • P(h);::QAR(G)+S(E),DCHECK,XP(h)
      • Refutation
        • P(f);
    • Try
      • Q(G);
      • Threat
        • QAR1(G),XP(f)
      • Vars
        • S(c);N_GUARD::QAB1(G)
        • S(c);N_GUARD,N_SPINQ(b)::QAB1(G)
        • S(c);N_GUARD,N_SPINS(j)::QAB1(G),XS(c)
      • Refutation
        • B(g);CHECK,XS(E)
  • Actual
    • Q(G);
    • Threat
      • QAR1(G),XP(f)
    • Vars
      • B(g);CHECK,OGATE,XS(E)::QAR2(G),XB(g)
      • S(c);N_GUARD::QAB1(G)
      • S(c);N_GUARD,N_SPINQ(b)::QAB1(G)
      • S(c);N_GUARD,N_SPINS(j)::QAB1(G),XS(c)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).